Monitor revives only after cycling the power many times

At boot-up, the black light of the monitor appeared to come on and the LED power light is green. No images would be displayed and the front panel controls would be frozen. I unplugged and plugged in and then the monitor functioned as normal. The problem got worse. I had to unplug and plug in several times before the monitor would function normally. Later, I discovered that I could unplug the monitor from the PC and allow the test pattern to float about the screen for several minutes before reconnecting. This procedured seemed to substitute for the cycling of the power, i.e., after serveral minutes of the test pattern, I could connect the monitor to the PC and it would function normally. The problem is getting much worse. Instead of a few minutes of the test pattern, I now must leave the test pattern on the screen for hours before reconnecting. If I am premature, the front panel freezes and the screen is blank, although it appears to be back lit. I have tested the monitor on another PC and it manifests the same problem.
By cycling the power, or by using the test pattern, an image is displayed on the screen. It seems this must happen to "warm up" the monitor in some way. Some threshhold is crossed and then the monitor can opperate perfectly normally.
What's wrong and how do I fix? Thanks.

I have a very similar problem: Monitor worked fine .. flawless for over two years. Then last week would not sync up with my laptop. If I booted the laptop separately, and then plug the monitor in...after a period of time it would finally sync and then worked fine again. Each day it has been taking longer for this to happen .. and now it doesn't sync at all. If I leave the two connected and the laptop goes into sleep mode, the screen comes back for me to log in on the laptop, but then both screens are black .. and I cannot do anything other than a hard shut down.

Any ideas out there?

Thanks!I have a very similar problem: Monitor worked fine .. flawless for over two years. Then last week would not sync up with my laptop. If I booted the laptop separately, and then plug the monitor in...after a period of time it would finally sync and then worked fine again. Each day it has been taking longer for this to happen .. and now it doesn't sync at all. If I leave the two connected and the laptop goes into sleep mode, the screen comes back for me to log in on the laptop, but then both screens are black .. and I cannot do anything other than a hard shut down.

1 Answer

Unscrew 4 screws on the back side. Place the monitor with the front up and open it along the upper seam. Turn it again and lift the back cover. Shift the inner case "up" and take the button holding plate out - it is being held only by a tape. Inspect it and clean it. You might have to replace the condensers and/or switches on it.

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I switch on my PC, ensuring that all cables, leads
and power supplies are connected properly. The tower powers up no
problems at all. I switch the screen on, the green led lights up, the
screen is completely black. A blue box appears centrally on the screen
with the text 'power saving mode'. The green led light turns amber and
then the screen just goes black.

Hello Chelleydiao, hi, its either you have a CPU problem or the monitor itself. Check or use another monitor to see if the problem is fix. you see an blank monitor can also be caused by the CPU if it fails to boot. the aid the checking, do you see any orange light on the monitor? or any indication.... the led light on the screen in summary: green or blue means there is power and the CPU boots up.
if orange the CPU fails to boot, if there are no lights on the Monitor panels, there are problems on the monitor. check these first....I need a much detail description.

I believe the power led button is still on while the screen goes black, if yes, it means the picture board of your monitor is bad that is why it appears for a second and goes black after that

Since the power led button is on, It means the picture
board on your monitor is faulty that is why it appears for a second and goes black.

The best thing for you to do now is to take the monitor to
a local repairer or any service center within your vicinity to help
with the replacement of the picture board because the fault is not
something you can fix yourself in other to complicate issues.

Take a look at your power saving settings. It sounds like the monitor is set to sleep after 20 or 30 minutes. You may want to change your setting to "never". The settings are under Control Panel - Power management

If screen says "Signal cable not connected " all the time till power led switches to Amber chances are monitor is ok and problem is with graphic card or cpu.Connect to Known working CPU and confirm that monitor is the problem.
If same problem persists on another working cpu after changing signal cable,the interface board in the monitor could be defective.
Samir